Statistics Page Broken

The statistics page is currently broken. We are investigating the cause of the problem

Github issue (Upstream)

https://github.com/mysociety/alaveteli/issues/4433

Raw text of error message

A Math::DomainError occurred in statistics#index:

Numerical argument is out of domain - “sqrt” lib/confidence_intervals.rb:28:in `sqrt’

Request:

  • URL : https://opramachine.com/statistics
  • HTTP Method: GET
  • IP address : 54.161.187.202
  • Parameters : {“controller”=>“statistics”, “action”=>“index”}
  • Timestamp : 2017-12-20 21:57:55 -0500
  • Server : opramachine.com
  • Rails root : /var/www/opramachine.com/alaveteli
  • Process: 23591

Session:

  • session id: [FILTERED]
  • data: {“session_id”=>“95647a59eaf52bc425f666123ae9fff8”, “locale”=>“en”}

Environment:

  • GATEWAY_INTERFACE : CGI/1.2
  • HTTP_ACCEPT : /
  • HTTP_ACCEPT_ENCODING : gzip,deflate
  • HTTP_CONNECTION : close
  • HTTP_HOST : opramachine.com
  • HTTP_RANGE : bytes=0-16384
  • HTTP_USER_AGENT : Slackbot-LinkExpanding 1.0 (+https://api.slack.com/robots)
  • HTTP_VERSION : HTTP/1.0
  • HTTP_X_ACCEL_MAPPING : /var/www/opramachine.com/alaveteli/cache/zips/production/download=/download
  • HTTP_X_FORWARDED_FOR : 54.161.187.202
  • HTTP_X_FORWARDED_PROTO : https
  • HTTP_X_REAL_IP : 54.161.187.202
  • HTTP_X_SENDFILE_TYPE : X-Accel-Redirect
  • ORIGINAL_FULLPATH : /statistics
  • ORIGINAL_SCRIPT_NAME :
  • PATH_INFO : /statistics
  • QUERY_STRING :
  • REMOTE_ADDR : 127.0.0.1
  • REQUEST_METHOD : GET
  • REQUEST_PATH : /statistics
  • REQUEST_URI : /statistics
  • ROUTES_53640860_SCRIPT_NAME :
  • SCRIPT_NAME :
  • SERVER_NAME : opramachine.com
  • SERVER_PORT : 80
  • SERVER_PROTOCOL : HTTP/1.1
  • SERVER_SOFTWARE : thin 1.5.1 codename Straight Razor
  • action_controller.instance : #StatisticsController:0x0000001129a7a0
  • action_dispatch.backtrace_cleaner : #Rails::BacktraceCleaner:0x0000000a89b570
  • action_dispatch.cookies : #ActionDispatch::Cookies::CookieJar:0x0000000d69b9e8
  • action_dispatch.cookies_digest :
  • action_dispatch.cookies_serializer : hybrid
  • action_dispatch.encrypted_cookie_salt : encrypted cookie
  • action_dispatch.encrypted_signed_cookie_salt : signed encrypted cookie
  • action_dispatch.http_auth_salt : http authentication
  • action_dispatch.key_generator : #ActiveSupport::CachingKeyGenerator:0x000000095c7368
  • action_dispatch.logger : #ActiveSupport::Logger:0x0000000655fa18
  • action_dispatch.parameter_filter : [:password]
  • action_dispatch.redirect_filter : []
  • action_dispatch.remote_ip : 54.161.187.202
  • action_dispatch.request.accepts : [#]
  • action_dispatch.request.content_type :
  • action_dispatch.request.formats : [#]
  • action_dispatch.request.parameters : {“controller”=>“statistics”, “action”=>“index”}
  • action_dispatch.request.path_parameters : {:controller=>“statistics”, :action=>“index”}
  • action_dispatch.request.query_parameters : {}
  • action_dispatch.request.request_parameters : {}
  • action_dispatch.request.unsigned_session_cookie: {“session_id”=>“95647a59eaf52bc425f666123ae9fff8”}
  • action_dispatch.request_id : 7b0d26e2-9544-49b8-a094-c9861a3e1076
  • action_dispatch.routes : #ActionDispatch::Routing::RouteSet:0x0000000664fd38
  • action_dispatch.secret_key_base : this default is insecure as code is open source, please override for live sites in config/general; this will do for local development
  • action_dispatch.secret_token :
  • action_dispatch.show_detailed_exceptions : false
  • action_dispatch.show_exceptions : true
  • action_dispatch.signed_cookie_salt : signed cookie
  • async.callback : #
  • async.close : #EventMachine::DefaultDeferrable:0x0000000f5e4480
  • newrelic.transaction_started : true
  • rack.errors : #IO:0x00000002041b98
  • rack.input : #StringIO:0x0000000f5e4ca0
  • rack.multiprocess : false
  • rack.multithread : false
  • rack.request.cookie_hash : {}
  • rack.request.query_hash : {}
  • rack.request.query_string :
  • rack.run_once : false
  • rack.session : #ActionDispatch::Request::Session:0x0000000f6343b8
  • rack.session.options : #ActionDispatch::Request::Session::Options:0x0000000f634368
  • rack.url_scheme : http
  • rack.version : [1, 0]

Backtrace:

lib/confidence_intervals.rb:28:in sqrt' lib/confidence_intervals.rb:28:inci_bounds’ app/models/public_body.rb:722:in block in get_request_percentages' app/models/public_body.rb:721:ineach’ app/models/public_body.rb:721:in each_with_index' app/models/public_body.rb:721:ineach’ app/models/public_body.rb:721:in map' app/models/public_body.rb:721:inget_request_percentages’ app/models/statistics.rb:49:in block (2 levels) in public_bodies' app/models/statistics.rb:43:ineach’ app/models/statistics.rb:43:in block in public_bodies' app/models/statistics.rb:42:ineach’ app/models/statistics.rb:42:in public_bodies' app/controllers/statistics_controller.rb:7:inindex’ app/controllers/application_controller.rb:120:in record_memory' lib/strip_empty_sessions.rb:13:incall’